File configurations for each network device you may have or want to add on your system are located in the /etc/sysconfig/network-scripts/ directory with Red Hat Linux 6.1 or 6.2 and
are named ifcfg-eth0 for the first interface and ifcfg-eth1 for the second, etc.
Following is a example /etc/sysconfig/network-scripts/ifcfg-eth0 file: